Slide fastener



I I u 1%, 19351. I G, H Q QRNER 2,047,925

SLIDE FASTENER Original Filed Oct. 15, 1932 INVENTOR. George H (Z Corner o mental July 14, 1988 uNrrEo s'rATEs SLIDE FASTENER George H. C. Corner, Birmingham, England. as-

signor to Hookless Fastcn'er Company, a corporation of l'ennsylvania Original application October 15. 1932. Serial No. 637,984, now Patent No. l,920,138, dated July 25, 1933. Divided and this application July 5, 1933, Serial No. 679.039.' In Great Britain October 17, 1931 This invention relates to separable interlocking fasteners in which two rows of fastener members are attached to fiexible supports and are so constructed that the members of one row interlock with those of the other row. The invention,

provides a new separable interlocking fastener inwhich the fastener members are of none-metallic material which is light-weight, of any desiredcolor, attractive in appearance, and smooth and otherwise pleasing to the touch due to its low heat conductivity.` This application is a division of my application Ser. No. 637,984, filed October 15, 1932,V now Patent 1,920,138, dated July 25, 1933. The principal objects of the invention are to provide an interlocking fastener of this type w which will be strong and durable, highly fiexible `without opening up, and in which the fastener members are very flrmly and neatly secured to their flexible supports.

Other objects and advantages ofthe invention will be apparent from the accompanying descrlption and drawinfg, 'the single figure of which w is a perspective view of one form of fastener 26 stringer constructed according to my invention,

Separable interlocking fasteners have heretofore been made of metal but the methods and apparatus for their-manufacture are unsuited to 'making fasteners of non-metallic materials 'because non-metallic materials can not be successmembers are produced from a suitable non-metal- 40 lic material and are then firmly attached to the tape by sticking, for example, cementing, gluing or by temporarily softening' the materialv of the fastener member sufliciently to make'it adhere to the fabric.-- The term' "sticking as used herein' and in the appended claims, means causing the elements to adhere to the tape by the use of cement, glue or the like, or by softening surfaces of the elements, and is intended to distinguish from amxing the elements 'to the tape by Vmechanical gripping or by casting them directly upon the tape., Likewise the term sticking material" is used to define the'material in the completed article which bonds or sticks the fastener member to the supporting strip. It may be 56 cement, glue or the material of the fastener elez cham. (cl. 24-205) lment which has been softened by solvent and later (med.

The non-metallic material used in making the fastener members may be selected from a wide range of plastics; e.- g., cellulose ester or ether material, resinous polymerized unsaturated orglanic compounds, phenol-aldehyde resins, ureaor thiourea-aldehyde resins, polyhydric-alcoholpolybasic-acid resins, or other artificial resins.

The fastener members may be shaped or formed 10 by molding, die-casting, stamping or other forming process from the non-metalllc material. They may be formed singly or in rows with proper spacing. Preferably I group the individual formed members with the required accurate and 15 uniform spacing before inserting the tapes. The edge of the'fastener tape'may be easily inserted into the slotted bases of the fastener elements because the sides of the slot are parallel.

The sticking of the fastener members on the 20 fabric tape may be effected by 'softening the bifurcations or the inside portions thereof by heat, solvents, or other means so that they become stuck to the-'fabric tape,l when the 'members are applied on the tape; The tape may be saturated 25 with a suitable solvent which softens the inner surfaces of the fastener members when applied i. tothe saturated tape. When the solvent afterwards evaporates, the fastener members are firmly stuck to the tape by a dried solution of the 30 fastener member material. In the case of insoluble materials, the tape may be treated with a suitable adhesive or cementing material which may adhere both to the fabric and the material of the elements when applied to the tape. It is 35 important in the flnished fastener that the fabric tape between the fastener members remain fiexi-i fashioning and before flxing on the fabric tape or after they have beenfixed on the fabric tape.

Referring to the single figure of the drawing, the fabric tape is indicated by the numeral IB 50 and the fastener members are shown in uniformly and closely spaced relation on the edgeof the tape. The interlocking or projecting ends of the elements are indicated at |2 and the bifurcations or prongs by the numeral ll.

While I have shown and described in this application one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purpose of illustration and description and that various other forms may be devised within vthe scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. A separable interlocking fastener of the class separated by a parallel sided slot which receives the edge of the tape, the width of said slots being substantially equal to the thickness of the edge portions of the strips, and said members being held on the edge of the tape solely by adhesive means between said parallel sides of said slot and said tape, there being a well-defined clean cut aos'aeac lline of demarcation between said Iplastic material of the' fastener members and said flexible strip whereby the fabric tape between the fastener members has the maximum iiexibility.

2. A separable interlocking fastener of the class described comprising a pair of flexible strips, co- Operating series of' fastener members arranged in uniformly and closely spaced relation along the adjacentedges of the strips', said members consisting of plastic material in a hard state and each fastener member having an interlocking. head portion projecting from the edge of the strip and a slot which receives the edge 'of the tape and which is at least as wide at its entranceas at any other portion,. the sides of the slot contacting at all points with the strip and said members being held on the edge of the tape solely by adhesive means between the sides of said slotand said tape, there being a well-defined clean cut line of demarcation between said plastic material of 20 the fastener members and said flexible strip whereby the fabric tape between the fastener members has the maximum flexibility.

GEORGE H. C. CORNER. 

